es安装
https://www.cnblogs.com/jingping/p/9448099.html
https://blog.csdn.net/zhanyu1/article/details/88079626
elasticsearch启动常见错误
https://www.cnblogs.com/zhi-leaf/p/8484337.html
head（docker安装，Content设置）
https://blog.csdn.net/weixin_30613343/article/details/99501331